In norvig page, norvig.com it is said that a good method to increase the power of the team is to choose someone that is better that someone at google. The author did a statistical simulation to show the positive effect of this strategy compared to another one. There is someone working at google that was working at apple and is good at social blogging (I don't remember now his name) but he didn't pass the test and he is working remotely (a exception). Also someone said that if you go before seven p.m. you are looked down, I am only remembering things I read on blogs.